diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/table/TableInfo.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/table/TableInfo.java
index 8567146e..a188fd7b 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/table/TableInfo.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/table/TableInfo.java
@@ -1102,8 +1102,13 @@ public class TableInfo {
                         .typeHandler(configuration.getTypeHandlerRegistry().getTypeHandler(genericClass))
                         .build();
                     String nestedResultMapId = entityClass.getName() + "." + field.getName();
-                    ResultMap nestedResultMap = new ResultMap.Builder(configuration, nestedResultMapId, genericClass, Collections.singletonList(resultMapping)).build();
-                    configuration.addResultMap(nestedResultMap);
+                    ResultMap nestedResultMap;
+                    if (configuration.hasResultMap(nestedResultMapId)) {
+                        nestedResultMap = configuration.getResultMap(nestedResultMapId);
+                    } else {
+                        nestedResultMap = new ResultMap.Builder(configuration, nestedResultMapId, genericClass, Collections.singletonList(resultMapping)).build();
+                        configuration.addResultMap(nestedResultMap);
+                    }
                     // 映射 <collection property="..." ofType="genericClass">
                     resultMappings.add(new ResultMapping.Builder(configuration, field.getName())
                         .javaType(field.getType())